Returns a copy of the point with the latitude coordinate set to the specified latitude value.
      Syntax
         
            point-expression.ST_Lat(DOUBLE latitude_val)
      
      Parameters
         
            - 
               latitude_val – 
               The new latitude value.
            
Returns
         ST_Point Returns a copy of the point with the latitude set to the specified value.
      Standards
         
            SQL/MM (ISO/IEC 13249-3: 2006) Vendor extension